Electric control for elevators.



E, L. DUNN.

ELECTRIC CONTROL POR BLBVATORS.

APPLICATION FILED JUNE 5, 1908.

Patented Apr. 18, 1911.

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ELECTRIC CONTROL FOR ELEVATORS.

AP'PLIUATION FILED JUNE 5, 1908.

Patented Apr. 18, 1911.

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13. L. DUNN. ELECTRIC CONTROL FOR ELBVATORS.

, APPLICATION HLED JUNES, 1.908. v 989,584. I Patented Apr. 18,1911.

UNITED srnriis PATENT orales.

EDWARD L. DUIIN, or WORCESTER-, MASSACHUSETTS.'

l ELECTRIC CONlIROL FOR ELEVATORS Specification of Letters Patent.

Application filed June 5, i908. Serial lto. 436,831.- A l 7 Patented Apr. 18,

To allwhom 'it may concern: y

Be it known that I, EDWARD L. 'DUNN,a' "citizen of the United States, residing at W orcester, in the county of lVorceste" and State of Massachusetts, have invented a new 4and 'useful Electric Control for Elevators,

f fof which the following is a 'specitica-tion.rL

Thisiiivention relates to'an Aelevator sys- .tenr and while lcapable ol use for passenger elevators` is particularly adapted to freight elevators 'andfdu'inb waiters.

The invention is described herein chietiy 'as an improvement on my prior application for patent tiled July 2, 1906, Serial No. $124,384, but certain features are capable o'l" use independently of that type of elevator4 system.

The principal objects of this invention are to provide an improved operating box;

an improved indicator, independent limit circuitstclosed by the main switch, a i stop solenoid switch, a test switch, improved slow speed connections, etc. all so arranged andl constructed that the operating'box is safe in the hands of the most inexperienced operator, being inoperative at all times when it should be, so the car cannot permanently getout of Aposition'with the pointer; that the entire mechanism is magnetically automatic, z'. c., two clutches operatethe two direction switches and release an operating box hand wheel by means of magnetism, so ignorant operators cannot break the apparatus as they have been-known to do with a locked mechanism; that the signal lamp is an element ofthe mechanism, as it acts as protective resistance to keep the 'solenoid i from heating and also takes the shunt circuit s the solenoid is de'e'nergized, and the solenoid acts as r sistance to dnn the light; that the V-shaped contacting point. or wedge of the indicator is used to forcethe. stop switch to close; the shape being changed as 'depen'dently otfthe operating` lio g"`iiiid .the

motor tal r door switches can be short circuited by it; and that the peration and construction shall' be iinprovc'dwai-id sim lished.

Further."objects'-a'ii advantages of the invention `will'appear hereinafter.

Reference is to be had to the accompanying drawings in which,

Figure 1 is a wiring diagram of the systeni in a practicable forni, F 2 is a front view ot the operating box partly broken away to show interior construction. Fig. 3 is a transverse sectional view of the hsame. Figs. land o are views of details thereof. F (3 is a t'ront view of the indicator. Fig.

7 is a `tragnientary enlarged front View of the contacting pointand associated mechanism. llig. 8 is a central longitudinal sectional view thereot, and Fig. v9 is a sectional view of a det-ail ot the indicator.

The invention is'illustrated in the forni ot an automatic'freight elevator, usually known as a dunib waiter machine. Automatic dumb waiter nnuzhines-liave usually v been designed to operate trom all doors at which the car stops. This machine is intended to be. operated `.Vroni one iioor only, and as a consequence is iliade simpler than other machines which have full automatic features. The machine run by a Single operator in response to annunciator or other suitable signals. A y v l while the invention 'is illustrated `as a drum type ot machine having an electric motor, the controlling apparatus applicable in every way lo plunger or other torins ot' hydraulic elevators, the main diillerence being that where a main reversing switchis used l'or the purpose otLcontrolling an` c electric motor, a pilot valve can-be used in' a similar: way i'or controlling a hydraulic in my application tiled Feb. 14, ltltltterial No. 415,501). i The following description of the1\'viring ldiagram relates to a drum type elcctricina'- chine, -the niotor being coinpoiii'id wound,

.series and slni nt"and reversible. l This ino- .tor is direct. connected to worm: gearing in thel usual manner, -foi'the purpose cti-evolving the drum. '('llhesame as ullydescribedand illustrated' in'` my cti-pending" applica'f tion Sen No 324,384). All circuits and controlling apparatus are' shownin airing diagram liig. l. The complete,apparatus, as shown, conipris= I a main rcversiir;` switch 7 drawing ot pilot valve g camp.

actuated by solenoidsfor operating the lnotor ill both directions, two direction solenoid switches for operating the main reversing switch solenoids; :t rheostat actuated by a solenoid for accelerating 'and retal'ding the motor speed; a slow speed solenoid switcll, for controlling the rheostat. car attachment and shunt brake solenoids, alld incidentally for opening and closing the stop circuit; also a compound wound brake solenoid, a ear attachment for operating the door locks, a

The diagralll (Fig. l) is argilnged for five floors. It shows the parts ill the position `occupied when the machine at rest with thecar at tllerd floor and everything ready Y to start. With the parts ill this position the circuit can be traced as follows: starting at plus side of lille switch tllrough #I fuse to stop switch contacts X-X, through limit switches F5-F,'and wire n to test switch TS, through wire W 2 to operating box binding post M3, through operating box solenoid Y to binding post L,through signal lalllp S and wire 73 to binding post Il", through wire l* and door switches DSDS- DS3-DS and D55 to #4 fuse and lllillus side of line. The above described circuit passing through the operating box solenoid serves three purposes, z'. c., it causes the signal lamp S to give a. diln light and at the saine time locks all operating box pointer U to a hand wheel T by nleans of a clutch arrangement at solenoid plullgers V-v-V2, (see Figs. 2 and 3) and in addition to this alrarnlature Z is attracted toA the. solenoid plun! ger V, so that when the plunger VI is turlled the armature Z will nlov`e witll it alld will close one of the operating box direction 2ndz^Tlle up direction, switch lli will close and open. 3rd :-'l `he up direction solenoid switch N will be energized and wil scribed.

The circuit through the u direction solenoid is as follows :-from p us side of lille c switch tllrou rh #l fuse, stop switch contacts X-X, illlit switclles F.-F, and wire W1 to test switch, through wire 1V' to operatin box binding post M', through up direction switch D, and wire lV to directionsolenoid switch contact F1, through solenoid N, resistance O, and wire W' to #4 fuse and minus side of line. The energizing of the solenoid N o rates to make the contacts Fx and E. e up direction solelloid switch when operating maintains its circuit independently of the operating bolt direction switcll and also feeds the up main switch solenoid circuit as follows :-from plus side of line switch through #l fuse, sto switch contacts X-X, limit swltches F5- wires W' and W", contacts IPL-F1, through solenoid N, rsistance O, and #4 fuse to minus side of line. The up direction solenoid switch N when operating feeds the up main switch solenoid. The circuit is as follows froln the upper limit switch F as before described, through wires lV and We, through contacts F0, and main switch up solenoid 02, wire W, #3 fllse, wire W, through slow speed switch solenoid O, to billding postl 1)..5., through wire "2 to operatin box binding post R, and door swltches S1- I)S`-'-I)S3DS and DS5 to one side Vof test switch, tlll'ough #4 fuse to minus side of lille. From this itv can be seen that the up direction solenoid switcll N is supplying 'its own current, is ill series'with resistance O, and is ill parallel with the nlain switch solenoid O. It can be seen further that the up direction solenoid switch N is supplying current to the up main switch solenoid O" and that the latter is in series circuit with the slow speed switch solenoid O, and door switches, also if a door switch were now opened. the lnain switch solenoid would be denergizct-l, but not the direction switch solenoid N as its circuit does not pass through the door switches. The lllain switch solenoid ()2 has now closed contacts` FT- l*`f-I `-l"1", preferably ill the n'nlnllelset t'ortll ill luy above identified co-pending application Ser. No. 324,384. The nluin switch circuits will now be traced," Y

Starting at plus side offy line switch the current path is through ,wire m to lnaill .switch hillding post M1, through wire to contacts Fl, tllrougll 'wire m to bit ing 'wt M. l `ronl this poillt the controli ci .zit

.will lil-st be followed and later the lnotol circuits will be traced: from binding post M, through wire W and #2 fuse, through wire Wl, alld slow speed s'witch contact F to 1", which are now bridged as above de- Fronl contact F three circuits are inode, vLe., thev rhcostat solenoid circuit, the

'sliunt. ljiialie'soleiioid circuit, andthe ear zittacliiiient'solenoid circuit. It can be further noted thaty the circuit through the slow speed K switch lower contacts F12-4" to stop switch y solenoid NT-is now open.

The rlieostut so' lenoidcircuit can be traced troni contact lf,

through wire Wl, and solenoid to inain switclibiiiding post ll,througli wire W,

and contacts F1", to binding post l, through wire. l to ininus side of line switch. The shunt brake. solenoid circuit can be traced from slow speed switch contact F". through] wire i, and shunt winding?,r of brake solenoid to inain switch" hiiiding postlt,

,tlirough vwire lV. niaiii switch 'contacts 1"1.

and binding post l?. wire lV to niiiius side of linefswitch bet'ore.r The circuit to the carattachniciit solenoid U2 is troni contact F, through wire \\"-",1throug`h the solenoid L, bach -througlrthe cai' cable wire W2", to inain .switch bindingr post l yand, toiiiiniis `side "of line switch before, throug'l-i wire f1, `contacts Fl and wire lV. lt isto be notedatl this point that the rhe'ostat is op? erating, closing the rheostatcontacts l--Z- and (t and accelerating the inotor "speed, as will be-desci'ibed later. Also that thebrake solenoid is energized.aiid'liolding the brake open regardless ot the series winding, andv that the car attachment solenoid U2 is energized and holding a cani out of closcsthe up side of inain su'itclnband also the`up auxiliary switch l",'.l"" and vice versa-when Vthe down Asolenoid tr" .opera-tes.

The auxiliary switch circuits will now be de?.

scribed, Auxiliary switch contacts F14-Fm 'govern the signal lainp" S and consequently these contacts are bridged every time the main Switch operates regardless of direction, but, the other auxiliary"4 switch contacts' l""-F-l"1B and l"" are` bridged alternately as the niain switch operates in alternate directions. As the inaehii-ic is now being'described as running in an up direction,

"auxiliary switch contacts I"""`-F15also of the operating4 boxen-cuits and freicren'cc vwill, bc'niade'lo these later. Whenthc inain rerersii'rn' Switch operates in cithergdirection onergi-zes the operating box solenoid' Y, re'iideri ng the .oi'icrat nin` box uicchanisin irre- .sponsivs toyany inorenicnt ot the hand wheel,l aii'dat the same'tinie Causes tlie'siginillain'p S to burn at fullcandle power as' i follows: The current startingjfroin plus side of line switch passes through '#1 fuse, .and stop switch contacts X-X, through limit switches F5411, and Wire \\"7,.tlirough auxiliary switch contacts IW-1", and .wire l to operating box bindingpostl, through"` signal lanip S and wire Wto binding post` R, through wire` "4 and door switches DSLsDS-DSS-Dtltand DS.5 ,to #4f fusey and niinus Side of line( 'It can be noted here ,Y that openiner one of` Vthe door switches would not onlyst'op the inachiiie,*a"s 'befor mentioned,but would also extinguish the?A signal lainp, which would notifythe oper' ator that thefinachine 'as stopped. It can be further notedthat the operatingbox s0-A i lenoid Y is nowdcnergrized as it \\'as'ori,:,i` iially. in` series circuit with. Vthe signal' lainp which is now across the line. The

.operating box solenoid is consequently shunted" outof circuit and the clutch released. It' the hand wheel were nowturned the pointer wouldnot inove with it as the solenoid plungers VlV2 are apart and the clutches open. I

Another point to take note of is ythatther normal central position and the operating` `box direction switches D1 and 4D are openlaj lt can be tui-ther expla ined here that when the 'operating' box hand wheel vas turned the f solenoid pluiic'ers `V--\"' turned with it as they were locked togethen'by ineans oftheI 0 magnetism holding the clutch inront'achtdetails of clutch are shown in Figs. 4 and 5). Also the arinature Z beine` magnetically attraetedv to the plunger V? moved with the V plunger.' As 'the f armature Z- niovedv the arniaturc roller Z1 engaged the direction switch lever DHcausinnr the switch to close, bultas the solenoid is denergized thc'spring.;` lf snaps the direction switch lever lDt aiid the arinaturc Z back to the noriiial central position.` 'liliearniature rolle'isZls-Z" are ot insulatingmaterial', like-wise the springr lf" is insulatedy at eachcnd, (see Fig. by.

The inain.4 switch and iiiotor circuits willl now be described. The.. niaiii switclnas in` in ij colpendinler application Hei- No. 324,38# y `is providedwith a leijer (not shown herein) piroted in the center which oscillates in see lsaw fashion in response to, vthc solenoidswhich are connected to this lever at either side oi the center. AtiA the ends of the llever insulators lil".

These con-,A tact's are ijnfei'ciably '.arbon iaecd.insulated troni each other and connected with the with a duplicate set of carbon faced s ring contacts which are stations It can t erefore be readily understood t at the switch is interlocking, z'. e., that there is no possibility of both sides acting atonce. It cannbe further seen that either'set of main switchcon tacts are fed from the binding posts Ml--t Al-Az-R To trace motoi` circuits -start at plus side of line switch throu h wire' W1s to main switch binding post Lthrough main switch contacts F1, and wire W2s to binding post M, through wire YV to the series and shunt fields. The shunt field circuit is completed through wire W to main switch binding post R and Wire W1", through contacts F10 to binding post R2 and wire W1' to minus side of line switch. Startin again at main switch binding ost M, tt W, through series fie d to rheostat inding post #5, through all resistance in series to rheostat binding post #1, through wire YV",

, and series brakel Winding to main switch po'st A1, through' main switch contacts Fs, and wire WV to binding post 2, through wire W, through armature and back to inain switch binding post 1, through wire W and contacts F9, to binding post A2 and wire YV18 to minus side of line switch. It can be seen from the above described circuits that the shunt field is directly across the line, that the series field is in series circuit with the rheostat resistance, series brake winding, and armature.

A rheostat is indicated diagrammatically similar in construction to the main switch and like the one shown in my co-pending application. Ser. No. 324,384, c., there is an upper and lower set of carbon contacts, the lower contacts l-2-345 and 6 are insulated from each other. The upper contacts which are not insulated from each other are fastened to the rheostat lever, which is moved b v means of the rheostat solenoid and retarded when opening or closing by means of dash pots. As the rheostat 'lever moves, the contacts ll, 2-2, 3 3,

4-4,l 5-5, G-(3, are made in consecutive order, with the result that the armature resistance is short circulted in regular order, and finally thefseries field is short circuited by means of the contacts (3 6. Thus it can be seen that -after the rheostat has operated, the motor runs at t'ull speed as a shunt motor, the series field and armature resistance being shunted out of circuit. lhen making a normal stop the rheostat solenoid circuit is broken before the main switch opens and the rheostat is caused to operate in a reverse manner to that described. This may be done by a spring in tension not shown herein as it is fully illustrated in my prior application Ser. No. 324,384. 'The result ot' the reverse movement is to reestablish the startingcireuit, or in other words to ou h wire.

put the series field and armature resistance back into circuit with the armature, and thereby cause the motor speed to be reduced before the machine stops. The manner in which the rheostat solenoid circuit is broken will be explained in detail later. From the foregoing it will be understood that'the operating box pointer was moved to the 4th floor indication, that'this movement caused the up direction switch Dl to be automatically closed and opened, that the up direc tion solenoid switch N- operated causing the main switch to operate correctly, that the slowspeed solenoid switch operated causing the rheostat, car attachment and shunt brake solenoids all to receive current and perform their various functions, that the auxiliary switch F, F15 caused the signal lamp to change from a dim light to a bright llght, and has rendered the operating box mechnnism irresponsive to movement of the hand wheel, that the machine is running'at full sneed in an up direction and consequently that the indicator A is revolving slowly toward the 4th floor contact. (Details of the indicator contactor appear in Figs. 7-8 and 9). As the machine is now escribed as running at full speed, reference will be made to the fact that it wouldy stop instantly if the circuit was opened at any one of the door switches DSl-DSz-DS ete., at either limit switch Fs-F, or ,at the stop switch contacts X-X.

The improved method by which the motor speed is reduced and finally stopped will now be explained. It is understood that the operating box segment P is in circuit with the long segment L4 and that the indicator A is slowly approaching the floor stop contact 4. When the contacter B engages the floor stop contact a circuit is made which shunts the slow speed switch solenoid O* out ofcircuit. The path of this shunt circuit is v4as follows: Ihe slow saeed switch solenoid O* has been shown to in series circuit with the main switch solenoids O2, O3, through wire l l". When circuit is made by the indicator at the floor stop, the current instead of passing through the slow speed solenoid takes the Ypath of least resistance, through wire V30 to contact member or shunt ring L5, which being in circuit with movable arm A allows the current to pass through contactor B to floor stop contact J through wire lV to o erating box se'gments P* and L, to inding post R3, through wire lV, door switches DS1-.-DS2 etc. to one side of the test switch, through #4 fuse to minus side of line switch. This circuit shunts out the slow speed switch solenoid thus denergizing it and causing the contacts FLJF to be o en eircuited with the result that circuits to r eostat, shunt brake and car attachment solenoids Uz are broken.. -Iithe motor is tnltingl current the vauxiliary switches will now bc `\Vlien thc niaclnnc is running in turn'ing by a guide plate F.

main switch binding post M1, 'tact FT -and'wire W2 to binding rheostat retards the current causing the ASpeed to be reduced. If the motor is not tali-ing current there will be no current pass.y ing through the series brake. winding and as the shunt, b ake circuit is broken the brake will be applied. In one case the tiow ot' cui rent is retarded, in the other the brake is applied, in either case the speed is reduced,

and the indicator contactor B continuesV moving to a central position with the lsith tloor contact.

-Itwill be noticed that the lcontactor yB Yprovided with a V shaped point, (see Fig.

As this point comes near to a central position withthe Hoor stop contact roller the frame C is forced hack, (see Figs. t3,- 7` and 8). The contactor B is pivoted tothe frame C which is arranged tofvslide in and out. As the frame moves it ,carries the plunger D with it. The plunger D is held out by a coil spring and 'is :provided with an adjustable screw contact which is prevented from Then the screw .contactJ E engages the switch contact G' a circuit is made throngha' stop switch 'solenoid N7 causing it to operate and break all controlling 'circuits through contacts X-fX,'thus causing the main switch to open and the machine to stop. The path through this stop switch solenoid can be traced from plus side of line switch, through wire 713 to through conpost M, through wire 714 to #Q fuse, through wire m5, lower slow speed` switch contacts F12-Jil, which are now bridged, and stop switch solenoid N7 to acontact member or vstop ring L, through sliding contact H (which is insulated froni'indic-.itor .f\,) (see Figs. 6 and 9), through contacts G-E--B "and #4t floor stop contact, through wire' 't to, opera-ting box segments 1"* and L, through binding post li, and wire 74 to door i switches DS1DS2-etc..througli #Lt tusc to ininus side of line. The stoprswitch when operating breakskall controller circuits vat X-#X as above explained, the rmain switch d as a consequence opens and breaks the shunt ing box pointer,

'are bridged.

passing through the stop switch solenoid. 'lhe machinehas therefore come to a t'ul-l stop and cannot lstart again excepty by-a further movcnicnt. o'l thc operatwhich would closc one of the'direction switches. The limitciicuits passing through the explained. an up direction thc auxiliary switch contacts FmF-FL" Suppose. tor instance that' the machine tailedtostop'at thc #4t 'lioor stop circuitwhich is ooiitact-,asabovc descril'icd,through accidenty or sonic other cause, the indicator contacter A would continnoits inovcnu-ait to floor stop Contact where thc. slow spccdI effect' and stop would tatie placel exactly as described `arc short circuit'cd, because and independently of the operating box circuits,` as follows:` from tloor stop contactv #5, through wire 732. and auxiliary switch contacts F13-F1, 'through wire 733 and' #at fuse to minus side of line switch. In such a case as this if an attempt were made to start the machine' again in an up drection, by moving the pointer toward the 5th. floor indication, the machine would not respond, as the stop switch circuit. would be made through the auxiliary switch contacts FIB-F1 and this would canse the stop switch solenoid N7 to open the, controlling circuits and prevent the Amachine from starting However, if the pointer were moved toward the 1st. Hoor indication the machine would start in the direction indicated b`f the pointer travel to the tioor indicated by the pointer.I From this it! can be seen that the carinust follow the pointer and that the two cannot get permanently out of position with each other. lnthe event of the machine failing to-stop nient:- of the indicator would open the limit Aswitch F4 or F", which would open thecontrolling circuits and nialtc it necessary -for the-attendant to get the` machine back into proper position. A

rl`hc test which 'l`h scrvesa.nsetiul pui'- pose when the machine is bci-iig installed or when it. is dcsircd to run the niacliinc indepcndentl)7 ot: the operating box, c., by opening the test switch thc circuit. to 'the opeintingv box solenoid' isrbrolten and the incchanisin would not respond yto movement ol'fthc hand wheel. l-lowcvcr. the attendant at thc machine could operate. it by manipu- `lating either direction solenoid switch aiul cause it to stop in the regular inanncr atany desired lloor by holding the wire "troin thc test switch to thc tloor stop lcontact .la at which it isdesired thc machine should stop. 'lhs would pc-rinitthev current' totlow dircctliY t'roin said contact J to the fuse JL instead ot passing through the parts-Pl or l", cllc..l1". li". 7H DalDS, ctc. to fuse 4.

'lhisktemporary circuit causes the machineto stop in the regular inannci' and f independently ot thc operating hoxcircuits. By reversing thc test switchktlic/ door switches fr the door again the car would resume its at the liinitfoor. a continued movc" with the liiieon lthe other side of them through WHDS and W1.

I will not describe the operation ofthe machine in the down direction as the circuits are identical with those described, ei:-y

cept that they pass through the down direction switch, down solenoids, down side of main switch, etc.

As the various circuits have been fully described` Iwill now describe more in detail the construction and voperation of the controllingr apparatus, and show wherein it diifers from that shown in my other application Sei'. No.. 324,384. The operating mechanismv used bythe operator may be contained'in a metal box. (see Figs. 2 and 3), which can be loc-ated in any convenient lace as it is electricallyT connected to the mac ine.

The box is shown arranged for 18 floors and is provided with a dial and pointer U, a hand wheel T and signal lamp S. The box cover has a circular opening, glasscovered, through which the floor indications and pointer are visible.

To start the machine the pointer U is moved by means of the hand wheel T.

When the pointer has moved one space on l the dial the machine starts. Tf. the operator releases the hand wheel T or attempts to reverse its movement, the pointer U is released from the hand Wheel and the operator cannotagain move the pointer until the machine stops, thus the operator cannot reverse the movement of the pointer after starting the machine, nor change its position after it has been set. neither can the pointer he moved while a. door is open. or in other words when there is no circuit. (ln my above mentioned application No. 324.384, the pointer could be moved while a door was open and could also be moved in one direction after it had been set, but in neither case could it be reversed.)

The signal lamp S sliown at top of the operating box gives three distinct signals in the same manner as in my above mentioned application, except that there is no .s ecial resistance required. as the solenoid I actsv as resistance to the signal lamp, and the signal lamp acts as resistance to the solenoid, each being accessory to the other. The signal lamp signals` are 1st. Door open l.ight extinguished. 2nd. Doo'r closed Light burns dimly.

3rd. Machine ruiining Light burns brightly.

a short segment for eachl floor P-PP, etc., and a long segment L for all doors, o inovablo arm L9 to which is yattached the pointer U and sliding contacts L'-L', which are insulated from the arm L. The segments Pl-Pz-Pa-IM-etc., repiesent the stop circuits, as one of them is always in circuit with the long segment L* b means of the sliding spring contacts L-- thus insuringthat the machine will stop at the floor indicated by the pointer.

The solenoid plungers are arranged to lock together when the solenoid Y is energized. (See details Figs. 4 and 5.)

The plunger V1 is hollow and contains a coil spring Q and brass plunger Q1 upon which the spring. acts when there is no circuit, thus opening the clutch. When there is a circuit the plungers V-V are locked together to form a clutch, and move with the hand 'wheel T. The armature Z swings loosely upon the shaft to which the arm L is attached, but when the solenoid Y is energized the armature Z is magnetically lttrucfed to the plunger V. therefore as thc switches D or D: accordingr to the direction of rotation. 'When the direction switch Dvor D2 closes` the main reversing switch box solenoid Y out of circuit, the shunt cirruit passing through the signal lnmcaus lng it to flash to full C. P. When t e solenoid Y is deneigized the armature Z is instantly released from the plunger V and `snapped to a central position by the spring lf, which also opens the direction switch. The clutch is prevented from releasing with the armature because of the friction between the jaws which are slightly undercut for this purpose. but when the hand wheel is released or reversed the spring Q is free to act which carries the pointer U. is fastened sccurely to the plunger "l and must always move with 1t.

operating box solenoid performs n number signal lamp. 2nd. Locks and unlocks the pointer from hand wheel. 3rd. Closes and opens the direction switches 'prises a metal ring J to which are fastened the floor stop .contacts J* and the two autoineinbei" A, which is indicated as connected. 'with a worm gear A and driven by means of a sprtcltct chain Afrom the dru'ni shaft. The member which is insulated from they woi'in gear is limited to slightly less than a complete revolution as can be seen froui Fig. (5. As the car makes u full trip the l member A revolves slowly from one autoplungei` moves the armature Z moves" with it until'it engages one of the directionI of duties, '1'. e., 1st. Acts as a resistance to thel The improved inilicatoi"(see Fig. 6) `com- .l

at the machine acts, shunting the operating and force the clutches apart. The arm L',

From the foregoing it` can be seen that the matics. or limit stops F. F, also u rotatable matic to lthe othertthe contacter B contact--A ing at each floor stop When passing it.j which 'incidentally closes the stop switch contacts EG. The contactorBA is shown as formed on thearc of acireleandvhaving at the center of its two armsy a projection B". It is pivoted" at the center behind' the projecger D, which presses against a flat si'irt'aee Blof the contacter. t A coil Spring K brings the two tlat surfaces together with theresullt that when the eontaetor Bis moved the plunger I) is cainined haelt.L This construction niakesthe,contactor B verytlevible and lprei-'ents any possibility of an open circuit.

:taking place atthe floor' stop contacts' when they are set close together'. The frame I to which B ispivoted 'andfwhich acts as a "lfstop to limit the swniging thereof, Isar- Jl-fJ having corresponding Slots (not shown).

,5two?stationary contact.members or rings ranged to .slide on two retaining screws At-th'e back endofzpliinger l) is ,the screw contactE, tliethreatled portion being' for llie piilvposfe ot' adjusting the space A 'guide between the contacts E and (if. I lplate Il" allows the contact E Vto slide lint pre- 'i vente` it 'troni lin-ning. T he carbon t'aced Spring` contact (l isV connected electricallyv `with a sliding' contact ll. inotherelidiiig: Contact rI'Igis electrically eonnec'teil ywith the parts A. B, C. D, E and F. '.l`he1fefore. the

i ,L54 on whichthejconlacts H and ll hear are together. Tl*

limit-cse all insulated 't'roineaclif other. The tloor` stop contacts are adjustable lalerall)v in i h'otlr direetionsgind are provided(with hrass fro'llci'xs` which contact willi" the coni'acmr lh Y "'.lcctrieally connected whenfthc stop.` `switeh contacts E andG tloor stop contacts and ALC,

a'iitonniticfs vare ot" The slow .speedf ett'ect taliesl place when theu "contacter 'l touchesv tlievllooi' stop cinitact at which it isto stop. The contacter ll adjiistsi'tscl'tl to the roller;andthe contact hecomes greatei.'v as the t'oriner nears aecntral position with the =rollci'.

roller. the frame' (l is quit-lily li'orceil 'haelt closing' the stop switch contacte ll (i and 8) and caiisiiie` Vthe viiiacliiin` to stop.'

illicit thelloor stop contacts are in correct.

position on the ring and are all exactlv on: V

switch tlie saineradiiisl troni the ceiiterfil. isia vertir ,screw contactk lil'.

simple inattei'f to adjust the automatic slopvpine' ot' the car in liotli,directions h v reinovin-- the sriiiihyplalc lf ai'iiladjiisiing the 'l'he stop switch contacts E-t`r lclose sooner orr later 'according `to the. space loetiween them aiidftlierebyeect,the stopping' o't the machine, The. liniitvswitches l""-`F"l, yare adgiistalole liinit.-stonfswitehes, .set to*l open immediately when the ear tails to Stop at either limit.A c

It will be seen that all the] above inen- 'hcn the protei-ting' or Vfshaped point ll*` Cuong-@S the may lie applied to other forms of electric as well as hydra iili'c. and other elevator sys- .teiiis without departing from the scope of thedeta'ils and 't'orins showinhii-t 'f 'liat I do claim isf- 'l .1 In an'elevator system, the combination of :Meal: a controllingr mechanism, amain vdirec'rtion 'off motion of 'the car, ineans"for connect-ing' said solenoids` with a source' of electrical energy comprising a pair o'dilec-f tion solenoid switches, and means fon re- An'ieehanisnt keeping the direction solenoid 'neeted one of the main switch solenoidswith switehlci'rcuit'is opened the directinilsole- Vincid switches willreinain-in the eircnit.HVV

i; 2;,'In` an elevator srs-tem. vthe combination lof afcontrolling' mechanismindependent of Qswitel'i electrical connections troinfthe `c0ntrollingineohaniem to said switches, a niain switclnhaving two f solcn'oids. connections: from each ofsaid direction :siilenoidiswitches direction solenoid switcl'ies, cach having connections when a solenoid .of thev'tnain` switch isdcnergiz'ed andlor preventing'the operation of the controlling` mechanism.

3Q In an elevator ,s vsteni. the eomhiifiation oi al ear, a controllingmechanism. :rinair solenoid switch, a vdirection solenoid switch'.

Sw itch inea n s tor keeping thedireclion solenoid.- switch in circuit, independently.' of tlientain solenoid after the former has coni' Ineeted the 'main switch'V solenoid with fthe source ot' energy, and a pliiralityof door switches in series with the inain Switch solenoid and with the controlling' mechanism,

Vwliere'by it' one "of said door switches vis opened. the. inainswilch will be thrown outot the circuit, thedirecltion solenoidswiteli' will remain in the irciiit' andthe controlf ling meehaniam cannot beioperated.

- Ztl. In ai'ielevatorsystem, the .eombi'natione of *au controlling' mechanism, a nia-in switch having ay pair-0f` solenoids, coni ,otinsrf'for tioned objects and advantages are attained iications ma)v he iinide'thereiii and that; it 75 u 'this invention as expressed in the'clainis, Y

therefore l doy not wish to be limited to all 80 switch having Vsolenoidsfi'ncontrolling'the 85pveiiting 'the operation ot' the eontr'oling 99 switcliesjin. the" circuit independent "fthe f- Iniai'ny switch solenoids` afterthey have convv the source of energy. lwhereb)7 -ify the in'ain 95 thef elevator car,` a pair of directionsolenoid 100 to one lo't'said niain switch' solciioids,fsaid 1.05

ihe'ansfor keeping closcdthe last.` inlined c for .connecting the isolenoid of the finain i with a. source of' electrical"energy` 11 solenoid supplying current to said solenoids, a direction 'solenoid switch, a plurality of ydoorswitches, said door switches being arranged the direction switch solenoids, and means operated by opening said door switches to break the series circuit, thereby leaving said parallel circuitiuidisturbed and the control?, ling mechanism inoperative. I

5. In an elevator system, the combination with upper and lowerlimit switches'zonnected in series with cach other and connected with the main for supplying current, said limit switches being adapted to break the circuit, of a main switch having two solenoids, each adapted to be connected in series with said limit switches, said solenoids also being connected with the other supply main, a pair of direction switches, and a pair of direction switch solenoids in parallel with the main switch solcnoids, and in series with said limit switches, and'means for operating said limit switches.

G. In an erle'vator system, the combination with limit switches, of a mainA switch'v having two solenoids, each adapted to be connected in-series with said limit switches, said solenoids also being connected with the supply main, a pair of direction switches, a pair of direction switch-solenoids in parallel with the main switch solenoids, and in series with said limit switches, and means for operatin said limit switches.

In an elevator system, the combination of a controlling mechanism, a pair of direction solenoid switches, electrical vconnections from the controlling mechanism to said switches, a main switch having two sole-y noids, connections from each of said direction solenoid switches to one of said main switch solenoids, said direction solenoid switches each adapted to remain energized to keep closed the last named connections when a solenoid of the main switch is deencrgized, and the main switch having means for supplying a shunt current through a path for causing the machine to stop.

` S. In'an elevator system, the combination of a car, a controlling mechanism, a main switch having solenoids for controlling the' direction of motion of the car, a stop-switch solenoid and a circuit for said stop switch said main switch constituting means for establishing a. shunt current through said circuit and means for breaking the stop switch solenoid circuit after one of txhe main switch solenoids has been connected with a source of power.

Si. In an elevatorsystein. thc combination of a car, a main switch buying solenoids for controlling the direction of motion of [the car, a stop switch solenoid, a ciirdlit for said stop switch solenoid, said main vswitch having meansv for establishing a shunt current through said circuit, and means for thereafter breaking the stop switch solenoid circuit.

10. In an elevator system, the combination of a car, a controllin mechanism, a main direction of mot-ion of the car, a stop switch solenoid, said controlling mechanism having means for establish' a shunt current throu h said stop switc solenoid to denergize t e main switch solenoids, said main switch constitutin means forhreaking the sto switch solenoid circuit aft one of the mam switch solenoids hasbeen energized.

11. In an elevator system, the combination of a car, a controlli mechanism, a main switch having solenoi s for controlling the direction of motion of thev car, and-a stop having means for establishing a shunt cui'- rent t rough said stop switch solenoid to deenergize the mainswitch solenoid.

12. In anielevator system, the combination of a car,`a main solenoid switch having connections for operating the car, a st switch havin a solenoid, and contacts in t e main solenoid switch circuit adapted to be opened by the stop switch said main switch -constitut-in y means for breakin the stopswitch solenoi circuit, whereby w en a shunt current is sent throughv said stop switch solenoid the controlling circuits will be broken and the shunt circuit throu h the stop switch solenoid will be broken y the main switch. Y "13. In an elevator system, the combination of a car, a main solenoid switch having connections for operating the car, a sto switch having a solenoid, and contacts in t e main solenoid switch circuit adapted to be opened bythe stop switch, said main solenoid switch constituting means for breaking the stop switch solenoid circuit, and an indicator comprising means for closing a break in a shunt circuit through the stop switch solenoid as the car passes each Hoor.

14. In an elevator system, the combination of an operating mechanism, a motor, means connected with the operating mechanism for directly controlling the operation of the motor, a plurality of motor stopping circuits in parallel with each other, having means for reducing the speed of the motor before stopsaid operating nicchanisrmand constituting cuits at the several floors.

l5. In an elevator system, the combination of an operating mechanism, a motor, means connected with the operating mechanism for direct-ly controlling the operation of the switch having solenoi s for controlling thel means for closingthc motor stopping cirswitch solenoid, said controlling mechanism l ping it, and a floor indicator connected with f cari's to stop, means connected with the controlling mechanism ordirectly controlling the operationof the motor With a floor indicator having a movable member,y a plurality of motor stopping circuitsin vparallel with eachother for controlling the stopping ofgthe `car and for reducingthe'speed ofthe ca-r before stopping, and'means for causing thenlast named movable-member to travel proportionately to the travel of the car.

vat

117i. In an elevator `system, the combination of acar, a main switch, va .controlling mechanism comprising a` movable member which by itspdsition determines the floor i. I at which the car .is'to stop, a floor indicator having a movable member. adapted to travel vproportionately -Vto the travel of the car,

ineens controlled/by said {ioorndicator and controlling.' mechanism for stopping the car andffor reducing the speed-of the car bef o'restopping, and limit circuitsindependent of saidcontrollinr mechanism controlled by .30

otheriloor if .it passes the floor determinedthe main switch or stopping the car atanby-the controlling mechanism.

18, In an elevator system, the combinaf tion of a car,'a main switch, acontrolliiig mechanism,a stopping device, a-floor indi.`

catorhaving` a plurality of tioorgstops, con- '.nectiol'is from said floor ystops through tlie controlling mechanism for establishing a f-*i foiirrent yto operate said stopping device,

andlimit circuits independentwif said conl t olling mechanism yadapted to be closed by e main switch, for operating said stopping device. An elevator system,'con'iprisinga floor indi'catorhaving fiooi' stops, a stopping de viCe, a main switch, a controlling mecha-` nism, and two sets ofv circuits adapted to lie closed respectively by the main switch and by the controlling mechanism, and both connected with said tlooil indicator 'for oper-k ating said stopping device.

' 20. Iii-lan lelevator system, the combination of a floor indicator, a stop switch having a `solenoid, a. main switch, a controlling mechanism, and two sets of circuits connected with said stop switch solenoid and adapted to beclosed respectively the main switch aiidby the controlling' mechanism,

2l. In an elevator s vsteimthe cmnliination of a car, a stop switch provided with a solenoid and having means for stopping the car at a predetermined floor, circuits tor operating said solenoid when the car reaches lsaid floor, and' independent 'limit circuits adapted to energize said stop'switch solevpredetermined floor.

p 22. In an elevator system, the combination with a main switch having an up sol`enoid and a. down solenoid, and auxiliary switches,- of a stopping device, a floor indicator, and means whereby while the floor indicator is moving in either direction the operating solenoid of the main switch will cause a circuit to be made for operating the stopping device ready to be completed when the floor indicator indicates that the elevator car has reached the last iloor. 9.3. In an elevator system, the combination of a slow speed solenoid switch, a stopsolenoid switch, a conductor. from the solenoid of each lof said switches, a loorindicator having two contact members, one connected with each of said conductors, a plurality of floor stops, a movable member adapted to engage said stops and having means forv connecting said contact members when' it engages any one of the stops, and for connectbers, and means connected with said Hoor stops for completing the circuits through said solenoids. 'Y

24,. In an .elevator system, the-combination of a'slow speed solenoid switch, a. stop soleid switch, a conductor from the solenoid o? each of said switches, a floor indicatin-4 having two contact members, one connected with each of said conductors, a plurality of ftioorhstops, a movable member adapted to engage said stops and having means for connecting said' contact members when it engages any one of the stops and for connecting that stop with both of said contact members, a controlling device, means connected with said floor stops and with said controlling device .for completing the circuits from lsaid s'olenoids,A and independent limit circuits conneet-ed with saidv Hoor indicator for completing said circuits independently of the controlling device. A

25.. In an elevator system, the combination of a slow speed solenoid switch, a stop solenoid switch, a` conductor from the solenoid of each of said switches, a Hoor indicator having two contact members, one connected with each oi said conductors, a plurality of' floor' stops, a movable member adapted to engage said stopsvaiid having mea-ns tor connccting said contact members with vany 4one ot the stops whenl it engages it, a controlling device. means connectedv with each floor stop and willi said controlling ,dev'icefor completingv` the circuits 'from both of said -solenoids` independent limit circuits connected with sa id tloor indicator 'for conipieting said circuits iiit'iependently of the conthe circu it.

noid aty another floor if it passes the said trolling device, and a maiA switch lia-ving QG. ln an elevator systennthe combination l ot a car, a floor indicator having two contactor comes fully into engagement with any one of said oor-stopcontacts, a circuit for tact. members, a plurality of tloor stops, a controlling the operation ofthe machine conmovable member adapted to engage said4 5 licor stops in succession and having means for connecting said contact members with each other when it-engages any one of the door stops and for connecting both of them with the tloor stop engaged, and operating circuits connected with said iloor stops and adapted to be closed by the movable member.

27. A floor indicator for an electric system, comprising two contact members, operating circuits connected with said members',

a plurality of floor stops, a movable member adapted to engage said floor stops in succession and having means or'automatically making an electric connection between said contact members and any one of the fioor stops when said movable member engages the Hoor stop.

28. In an indicator for an electric system, the combination of a pair of contact members, a plurality; of licor stops, a movable member adapted to engage said iloor stops in succession and having means whereby upon engaging floor stop it first connects said oor stop electrically with one of said contact members and thereafter connects said contact members with each other so that both of them are connected with the floor stop.

Q9. In an indicator of the class described,

the combination of tivo circular contact members insulated from each other, a movable member adapted to turn on an axis passing through the center of said contact members, a plurality of tloor stops arran ed in position to be engaged by said mova le member, and means on the movable member for first electrically connecting a lioor stop with one olf said contact members and therc after closing a contact, during the continued travel ot' a movable member, for connecting the other of said contact members with the firstone and with the tioor stop.

30. ln an electrical controlling system, the combination ci a hoisting machine, an indicalor comprising a pair of stationary rings, OO a series of flotastop contacts. a rotary contactor having means thereon tor electrically connecting said rings Wheneif'er said contactor comes fully into engagement with any one of said licor stop contacts, a circuit for controlling the operation of the machine connected with one of said rings, a circuit con-` nected with the other of said rings, and a stop switch solenoid located in said second circuit..

3l., ln an electrical controlling system, the

combination of a hoisting machine, an indicator con'mrising a pair of stationary rings, a series of iioor stop` contacts, a rotary contactor having meansthereon for electrically G5 connecting said rings whenever said connected with one of said rin s, a motor, and a circuit connected with sai motor and with the other of said rin s.

32. In an electrica controlling system, the combination of an indicator comprisin a pair of stationary rings, a series of oor stop contacts, and a rotary contactor having means thereon for electrically connecting said rings whenever said contactor comes into engagement with any one of said floor stop contacts. l

33. An indicator for an electrical control- 80 ling system comprising a series of contacts, and a movable member having a contactor pivoted thereon adapted to engage said series of contacts in succession during the motion of said member, and having a contact surface projecting therefrom at a slight angle to the direction of motion 'of the movable member.

34. An indicator for an electrical control-v ling system comprising a series of floor stop contacts arranged in a circle, and a rotary member having a contactor pivoted thereon and having a central projection and oppositely extending arm, all adapted to engage said series of contacts in succession during the rotation of said member.

35. A contactor for an indicator compris# ing a pivoted bar havin a central rojection'opposite the pivota point, an arms extending outwardly therefrom between said projection and the pivot und movable in the path of the end of said projection. l

3G. A contactor for an indicator comprising a pivoted bar having a central projection oppos1te the pivotal point, arms extending rearwardly therefrom, and resilient means for normally holding said contactor against turning on its pivot.

37. An indicator comprising a movin member having a frame slidingly mounte thereon, a contact movable with said frame, a second contact adapted to be engaged there' by when the frame moves, and a contactoron the outer end ofthe frame mou'ntedto swing thereon on a pivot. y

38. In an indicator for an electrical controlling system, the combination ofarotatable member, a frame arranged tolslide thereon, @contactor pivoted on said frame and havirlga surface extending behind the pivot onfgwhich it. is mounted, a plunger located ingposition to engage said surface and A normally hold said contactor against turning on'A its pivot, and a spring for holding said yjlunger yieldingly a ainst the contact. 39. A contactor for an e ectric controlling "system having a contacting member provvided with a curved surface and a wedge shaped projection between the ends thereof, a pair of stop switch contacts, la screwlf ing them can be regulated. j

plunger adjustable tor'egulate the space between the stop switch'contacts, whereby'tl'ic- .l time required for closing saidcontacts 'an regulate the stopping ot' the 1d jthereof, apair of stop switch contacts,` and adjustable means whereby when said pro-j jectio'n 'meets nii-obstruction the contact will l'ne moved into engagement; with each other andwherebyrthe4 time required for 'closing 1 5 said contacts can be adjusted.

41. An electric indicator'coniprisiiig a con-v tacting device having a movable member provided with a projection between the ends thereof, a pair ot contacts connected with I20saidpwmovable member wherebynylieii vsaid "projection meets an obstri-iction, one 'or said contactsl will he caused to move against the other., vand 'means for adjusting one of said,

contactshihercbv the time required 1Cor-closl lii an 'indicator-'tor an electrical con trolling system, the combination of a rotatable iiiciiiber, a frame arranged to slide thereon, a contactor'pivoted'on said `frame and having a surface extending beliind'tlie pivot on which it is niounteth'a plunger located in position to engage said surface and normally `hold said contacter against turning on its pivot, a `contact adjustably mounted 35 on said plunger, and yielding means for fore ing` said plunger toward -the contactor to lhold the latter yieldingly against turning.4

43. In an indicator for an electrical controlling system, the combination of a ro- 40 4tatablc member, a frame arranged to move thereon, a contactor pivoted on said frame, a plunger located in position to engage' said contactoi' and normally hold it against' turningon its pivot. a pair-.of spring-pressedcon- 45 tacts connected with said plunger, said rotatable member having a pair of spring pressed contacts thereon, insulated vfrom each -otl1ereach of said contacts being connected with one of said first namedspi'ingpi'essed 50,. contacts, and a controlling system connected' `with the 4first naii'iedA pair ol spring contacts.

44. In an elevator system, the' coinbination ota car, ".1 vfloor indicator havingl two pressed Contact. ineii'ihcrs, a plurality oli-floor stops,l

airiovable nicniber adapted to engage said Hoor' stops in succcssioi'i and having means forI connecting said contact men'ibers with eacli other when it engages any one of the floor stops and toi' connecting` both o't them with`r the floor stop engaged. operating ciricuits'.; (.foiin'ected with said tiooilsto'ps and adapted 'to be closed by the niovahle member, l

automatic limit stops 'connected with the in# dicatoij, and means for stopping the car it. switches 'coniiectedzl with bothY polesgfofv-the :139

of 'a cai-,a controlling 4device comprising a the movable member engages either of said stops.

Inaan elevator system, the combina-f;`

tion4 of a` direction switch, a magnetically cont-rolled'clutch therefor, and automatic limit stopsin series with'each other and with said switch and clutch, whereby said A.switch and' clutch are .rendered inoperative I `when either of said stops is open.. Y

46. In an elevator system, the combination A of a'tcar,"direct-ion switches,- a magnetically controlled clutch for'operating the direction switchesia pair of limit stops, both in series with each other, and 'with said s`Wit-ches,-

whereby' when one of' said limit stops is open, the switch will be rendered inoperative by thedenergizing of the clutch;

47.' Inian elevatorsystem, the combination solenoid, `connect-ions from said controlling device for controlling the operation of the elevator car, a test switch in series with said solenoid, whereby when the test switch is open the vvsolenoid circuit is broken, direction switches, each having a solenoid and capablev of being operated by hand, an .indicator hav- 'ing floor stop contacts, and a conductor connected `with one pole of said switch and vadapted to be held against` anyone of said floor stop contacts.

48'. In an'clevator system, the combination of a car, a controlling device comprising a solenoid", connections from said controlling device` for controlling the operation of the elevator-car, a test switch in serieswith saidsolenoid, whereby when the test sw'itch` is X yopen the soleiioidc'ircuit is broken, direction switches, each having a solenoid vand capable ofbeing operated byA hand, an Aindicator hav- `ing floor stop contacts, a conductor connected with one poleof said switch and adapted to.\

he held against any one ofsaid floor stop coin tacts, and connections from said loor stop contacts adapted to'be completed'by said wire for stopping the car.

.49. ln an elevator system, 'the combination of acar,l a controlling device, comprising a solenoid', connections from said controlling.A

device for controlling the operation of the elevator car, a test switch rn seriesv withsaid solcnoichwliereby when the test switcli. is

op'cn the solenoid circuit is broken, direction' switches. cach having a ..so1enoidand capableot being opcratedby hand, an indicatoi" ,having floor 'stop contacts, a'conductor com iectl .ed with one pole of. said switch and adapted"y to he held against any one of said' floor stop contacts, anda series ot door switches adapt'- 1 ed to be short circuited by reversingvthc tcstswitch.

5t). ln an elevator systenig the combination ot' n, controlling device, a test switch having` two pairs of poles, one pol-c of onevpair connocted with the line, a Asei-ies of .doory same pair, the other two poles being connected with the controlhng dev1ce, whereby when the first two poles o t the test switch,

52. In an elevator system, the combination of a plurality of door switches, a ca r, means for controlling the operation of the car comprising a handle, a pointer controlled by the handle, a pair of direction switches, means for connecting the pointer with the handle so that the pointer can be moved thereby, and means whereby if the handle is released or reversed, the pointer is automatically released from the handle In an elevator system, the combination of a series of door switches, a car, means for controlling thc operation of the car comprising a handle, a pointer controlled by the handle, a magnetically controlled clutch for connecting the pointer and handle, whereby the pointer can be moved, and means Whereby the reverse motion or the releasing of the handle will render said magnetically controlled clutch inoperative.

5i. In an elevator system, the combination of a movable controlling member, direction switches, means magnetically connected with said controlling member for closing said switches, and a series of door switches, said member and door switches being electrically C connected in series, whereby when one of said door switches is open all of said mechanism will be rendered inoperative.

In an elevator system, the combination of a movable controlling member, direction switches, means ior magnetically operating said member, and a series of door switches connected in series with said magnetic means, whereby the magnetic means will be denergized when any one of said door switches is open.

5G. In an electric system, the combination ot" a car, a door switch, operating mechanism, said operating mechanism having a pointer provided with connections for controlling the destination and direction of m0- tion of the carfa pair of direction solenoid switches, ,said door s witch and direction switches being connected with the same main. one of the direction switches being in circuit when the machine is inoperative from the opening oi' the door switch, whereby the pointer cannot get permanently out of position with respectto the car.

oor switches isv 57. In an electric system, the combination of a door switch, operating mechanism in. series therewith, aI direction solenoid switch having a circuit adapted to remain Aclosed when the door switch is open, wl'iereby under all conditions the opening of the door switch will cause the operating mechanism to remain inoperative, and the direction solenoid switch to remain in conditionior immediate action.

58. In an electric system, the combination of door switches, hand-operated operating mechanism in series therewith, and a direction solenoid switch in a circuit independent of said door switches and. operating mechanism, whereby it will remain in circuit when one of said door switches 1s open and the operating mechanism is inoperative.

59. In an elevator system, the combination of direction switches, means for closing said switches, direction solenoid switches connected with thc direction switches sowas to be supplied with current therethrough when the direction switches are closed, a main switch, a signal, door switches in series with the signal and connected with th'c same main as the direction solenoid switches, and means controlled by the main switch for sending a current through said signal, wherel'iy when a door switch is open the signal will be dcenergized and one of the directionA solenoid switches will remain in circuit.

('30. In an elevator system, the combination of a car, a controlling device comprising a solenoid, connections adapted to be operated and controlled by said solenoid for controlling the operation of'the car, a signal in series with said solenoid when the latter is energized, and means whereby said. solenoid maybe short-circuitcd.

(Sl. In an electrical elevator system, the combination of a controlling device ctnnprising a solenoid, a signal lamp normally in series with said solenoid, whereby said solenoid acts as a resistance to dim the light when the solenoid is in circuit and the vlight acts as a protective resistance to the solenoid, and means whcrebv the current is caused to pass through the signal lamp to light it to the full candle power and the solenoid is denergized, when the machine is running.

G2. In an electric elevator system, the combination ot' a controlling device comprisingr a solenoid, a signal lamp normally in series with said solenoid, whereby the solenoid acts as a resistance to dim lthc light and thus show the condition of the solenoid. and means whereby the current is caused to pass through the signal lamp to light it to full candle power.

Gil. In an electric elevator system.r the combination of a door switch, an electric signal device adapted to indicate when the door switch is opemand a direction solenoid switch arranged and adapted to remain in .circuit` when the door switch is open;

64. In lan' electricyelevator system, the

combination with a car, of .a series of door main inicircuit when a door switch `is open ready to act t0 control the direction of the car upon the restablishmentofcircuit `through the door switches. l

65. `In 'an electric elevator system, the

.combination of a door, anvelectric signalldevice, direction solenoid switches, and means whereby when a door is open the signal de vice indicates the same and one of thel direction-solenoid switches remains in :circuitL'v 66; In an electric elevator system, the coinbinationwith a car, of a series' of doors, an

electric signal device, direction solenoid switches, and means whereby .when a door is open,the signal device indicates the same and one-of the direction solenoid switches remains in circuit ready to act to control the direction of the car upon the restablisliinentof a circuit. l .67. In an electric elewator system, the combination of a hoisting machine, 'door switches, an electric signal device, direction solenoid switches, a solenoid clutch, and means whereby when the machine starts the signal device is caused to act at full power.v

68. In an electric. controlling system for. elevators, the combination with a car, of an operating mechanism adapted to control the destination of theicar and to be thereafter automatically rendered inoperative, door switches so arranged thatwhen one of the door switches is opentheoperating mechanis'm is thrown entirelyi out of circuit, and a signal device arrangedto-be thrown out of circuit when :one of the' door switches is open to show that the machine isstopped and to be thrown into circuit at tull power when CIT the machine is ruiming. y

f 69. In vau electric controlling system for eleva.t'ors,'the combination of a car, a series o't` well-room doors, a switch t'or each door adapted to open when the dooris opened, an operating box for controlling the system, direction solenoid switches having incansfor controlling the direction in which the cai shall start, said operating mechanism coniprising a. pointer indicating the destination ot the. car, and having connections tor stopping the car at the destination indicated, connections controlled by said pointer for stopping the car at (he proi'ier floor, and means whereby itl one ot said doors is opened i while the machine is running. the operating ofthe car at theproper floor.

70. In an electric elevator `system, the combination with a car, of a series of wellroom doors, a-switch lconnected with each 70 door to be closedwhen the door is closed, a signal-lamp connected and arranged to burn 'dimly when all the doors are closed, a plunger clutch, an armature for said clutch,

pointer will'be left set insuring tliestopping means connected with said clutch for controlling thedestination of the car, and means controlled by said armature for controlling the direction of motion of the-car, and m'eaiis whereby when all 'the doors are closed, the plunger-clutch -is closed, and the armature '80 is caused to niovcwith the plunger.

71. In an electric elevator system, the combination with alcar, of a. controlling handie, a pointer for indicating the destination ofthe car, a ynormally open two part plunger clutch one part of which is connected with vthe handleand the otherwith the pointer,` an armature adapted to be controlled b v the cli1tcli, direction switches, controlled by said armature, a main solenoid switch, a signal lamp, means wherebyvwhen the inai chine is ready to star-t and the handle is niov,ed"tli e plunger clutch is causedto close` and move the pointer, the armature being '4 arranged-to operate one of the direction 95 switches, the direction switch to close the mainswitch solenoid circuit, 4and the'l'main switch to operate the signal lamp to buinl brightly and to release the armature while the two parts of the plunger clutcliliangntc: 1.0.0 getlier mechanically, and means whereby thev inachineis causedto run. l

72. In an electric elevator system, the combination with a car', of a. controlling lian-1 dle, a pointer for. indicating the destination of the car," a plunger clutch .connected wit-h the handle for moving the iointer, an armature adaptedto vbe control ed by the clutch,

direction switches controlled by said armature, a in ain solenoid switclna signal lamp,

ya plunger clutch solenoid for causing theY elutclito close, `whereby the handle is caused to' n'iovc"`tiie "pointer, the armature being constr'cted and arranged to operate one of the direction switches, the direction switch to close'the main switch-solenoid circuit, and

vthe mainy switch to operate the signal lamp I to'burn brightly and Ato short circuit they plunger clutch solenoid so as to release the' armatijcre, means wherebythe machine is'l20 A caused to run,- and means whereby if the hau'dle is released or reversed, thesections l of the plunger clutch are caused Ato separate whereby the handle has no further control of the pointer. l e i i.

73. In an elevator system-,the combination ',o'l a car,l a dial infdilcatii'lig theiloor's,y a pointer adapted to 'cooperate,with the dial;

to show the destinationtofthe cair ,`ina.gnetic means connected with pointer for con- MU trolling the destination of the car, and a nal for indicating when the car is moving. when it is at rest but ready to more, and when the system is in inoperative condition.

74. An operating mechanism for an elevator car, comprising a dial indicating fioors` a. pointer adapted to cooperate with the dial to show the destination of the car, magnetic means'connected with the pointer for controlling the operation of the car. and a signal comprising means for indicating when the car is moving, when it is at rest but ready to more, and when the system is .inoperative 75. The combination with a hoisting inaehine, a car, and a controlling device there for, of magnetic operating means for thecontrolling device electrically connected therewith, a pointer connected `with said operating means for indicating the destination of the car. and a signal constructed and adapted to indicate more than two different conditions of the apparatus.

76. The combination with a hoisting machine, a car, and a` controlling device therefor, of magnetic operating means for the controlling device velectrically connected therewith, means for operating the machine, and means for indicating the destination of the car. Y '77; In an elevator system, the combination of a car, a pointer for controlling the destination of the car, a handle for operating the pointer, means controlled by the handle for starting the car, and means 'for releasing the pointer from the handle, so that the pointer cannot be turncdthereby.

78. In an` elevator system, the combination of a car, a pointer for controlling,r the destination of the car, a handle for operating 'the pointer, means controlled b v the handle for starting the ear, and a magnetic device connected with said means for starting the car for releasing the pointer from the ha die. so that the handle may be turned freely in either direction without moving the pointer.

79. In an elevator system, the combination of a car, a pointer for controlling the destination of the car, means for starting the car cont-rolled by the handle, means for stopping the car at the floor indicated by the pointer. a handle for operating the pointer, and means for'automatically releasing the pointer from the control of the handle adapted to operate whenever the handle is once turned in either direction and then released from the control of the hand.

80. In an elevator system, the combination of a hoisting machine. an operating box hav- `ing a movable pointer, a handle for moving the pointer, means whereby when the handle is started in either direction and then rcleased the pointer will be released from all farther control of the handle until the machine stops,and electrical means for controlling the operation of the hoisting machine directly .from said handle. c

S1, In an elevator system.y the combination of a hoisting machine, ay movable pointer, an

operating handle `for moving the pointer, means whereby when the machine is at rest the turning of the handle in either direction will tarn the pointer, means whereby if the handle is released after being started, the pointer cannot again be moved by it until the machine comes to rest, means controlled by said handle for starting the hoisting machine, in, either direction and for stoppin it, and an operating box inelosing sai means.

SQ. In an elevator system. the combination of a car. a handle for controlling the opera tion of thecar.r means controlled by the handie for starting the car, and magnetic means for controlling `the operation of the handle, said magnetic means being rendered inoperative whenever the handle is once turned backward or released after boing started.

83. t controlling mechanism for an elcvator system, comprising a controlling arm, a series of contacts with which said arm is adapted to engage, each contact representing a door in the elevator well, means for moving said arm along said contact-s, and means for releasing said arm and preventing the movement thereof in either direction after it is once started, and then reversed or released, nntil the elevator car has moved to and stopped at the floor indicated by the position of, the arm when so reversed or released.

84. A controlling mechanism for an elevator system, comprising a handle, a movable controllingr member, direction switches, and a magnetically controlled clutch having eonnections for releasing said member from the handle.

85. In an operatin box for an electrical controlling system, 't ie combination of a handle adapted to tarn on an axis, a controlling device, and a clutch between the con-trolling device and the handle having means for disengaging the controlling device from the handle if the handle is reversed, or released during its motion in either direction. f

86. In a controlling device for an electrical controlling system, the combination of a handle adapted to tnrn on an axis, apointer, and a clutch between the handle andpointer, whereby thepointer may be moved bv the handle, said clutch having mea-ns for disengaging it from the handle Whenever the lattcr is released or reversed.

87. In a controlling device for an electrical controlling system, the combination of a handle adapted to turn on an axis, a pointer, and a clutch between the handle and pointer, whereby' the pointer may be moved by the handle, said clutch having means for disengaging it from theliandle Whenever the lat- "ter is released or reversed, whereby the hanf .bythe handle, connections from the pointer forcontrolling the operation of the machine fin accordance with the position of the pointer, means between the handle and pointer whereby after the handle is started in either direction, the releasingY or reversing tliereou will release the pointer from the handle, and means connected with said. controlling systeni for restoring the parts to a l position inivhich the handle can again en- ,gage the pointer when the -rnachine to be f-controlled is at rest.

S9. In a controlling'device for an electric controlling System, the combination of a movyable handle, 4a pointer,

direction switches, and a double 4clutch controlled by the handle for connecting the pointer and the direction switches therewith so as to move with the handle.

90. In a controlling device for an 'electric controlling system, the 'combination of a handle, a pointer, direction switches, a double clutch for connecting the handle with the pointer and direction switches, said clutch havingmeans for disengaging it from the handle whenever the latter is released or reversed, whereby the handle may then be turned in either direction Without moving the' .pointer or closing the direction switches.

91. In anoperating box for an electrical controlling system, the combination of a 4 handle adapted to rotate on an axis,l a solenoid, al lunger Within said solenoid having a cutch section adapted to receive motion from the handle, a spring connected with tlie'plunger for normally forcing, thecclutch section into inoperative position, an armature .normally in central position adapted to rotate with the plunger when the solenoid is energized, and a pointer connected with said armature to rotate there- With'. Y,

E Intestiinony whereofvI have hereunto set ing witnesses. l l

EDWARD (L. DUNN.

lWitnesses f ALBERT E. FAY, C. Fonnnsr WEssoN.

the'presence of two snbscrib- 

